Will Wednesday be Seattle’s hottest day ever?

Break out the sunscreen and find yourself a pool. Wednesday might be the hottest day on record.

Joshua Trujillo / seattlepi.com

The sun beats down on Seattle on Monday, as seen from Elliott Bay. High temperatures have prompted heat warnings for the week.

“I think we have at least a 50 to 70 percent chance,” said University of Washington meteorologist Cliff Mass, who wrote about the forecast on his weather blog. “It’s gonna be extraordinarily warm no matter what.”

Mass has forecast temperatures to hit 102 degrees at Sea-Tac Airport on Wednesday. That would beat the record temperature of 100 degrees set July 20, 1994.

Thursday could be almost as warm, Mass said.

“It’s the stretch of days is what it is. That is almost as unusual that the temperature.”

The hot and dry weather will mean big crowds at lakes and beaches. It could also put the area at high risk for fires, Mass said.

It could also mean unhealthy air.

The Puget Sound Clean Air Agency is calling for high levels of ozone pollution in the Cascade foothills of King and Pierce counties and expects conditions to reach a level of unhealthy for sensitive groups.

Poor air quality may continue through the rest of the week. The conditions can trigger asthma attacks and make lung and heart problems worse.